Android ViewFlipper 简单应用

Android ViewFlipper 简单应用

废话不多说，直接看代码

activity_guide.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/guide"
 tools:context="com.example.weijian.homeletterapplication.GuideActivity">

    <ViewFlipper
        android:id="@+id/Main_ViewFlipper"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ViewFlipper>

</LinearLayout>

GuideActivity.java

import android.content.Intent;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.ViewFlipper;

public class GuideActivity extends AppCompatActivity implements GestureDetector.OnGestureListener {

    private GestureDetector detector;
    private ViewFlipper flipper; 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_guide);
        //隐藏标题栏
        ActionBar actionBar = getSupportActionBar();
        actionBar.hide();

        detector = new GestureDetector(this);
        flipper = (ViewFlipper) this.findViewById(R.id.Main_ViewFlipper);
        flipper.addView(addImageView(R.mipmap.guide1));
        flipper.addView(addImageView(R.mipmap.guide2));
        flipper.addView(addImageView(R.mipmap.guide3)); 
    }

    private View addImageView(int id) {
        ImageView iv = new ImageView(this); 
        //ImageView拉伸，充满整个ViewFlipper
        iv.setScaleType(ImageView.ScaleType.FIT_XY);
        iv.setImageResource(id);
        return iv;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // TODO Auto-generated method stub
        return this.detector.onTouchEvent(event);
    }

    @Override
    public boolean onDown(MotionEvent e) {
        // TODO Auto-generated method stub 
        return false;
    }

    @Override
    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
                           float velocityY) { 
        if (e1.getX() - e2.getX() > 120) {
            this.flipper.showNext();
        }
        if (e1.getX() - e2.getX() < -120) {
            this.flipper.showPrevious();
        }
        return false;
    }

    @Override
    public void onLongPress(MotionEvent e) {
        // TODO Auto-generated method stub
    }

    @Override
    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
                            float distanceY) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public void onShowPress(MotionEvent e) {
        // TODO Auto-generated method stub
    }

    @Override
    public boolean onSingleTapUp(MotionEvent e) {
        // TODO Auto-generated method stub
        return false;
    }

}